1. Gdansk University of Technology Narutowicza 11/12,Faculty of Electronics, Telecommunications and Informatics,Department of Microwave and Antenna Engineering,Gdansk,Poland,80-233
2. Warsaw University of Technology, Koszykowa 75,Structural Research Division, Faculty of Physics,Warsaw,Poland,00-662
3. Warsaw University of Technology Koszykowa 75,Faculty of Electronics and Information Technology,Warsaw,Poland,00-662